Dynamic analysis of shrouded blades and disc coupling system with freely slipping shroud contact surfaces

Discusses the application of the fixed interface modal synthesis technique and the quasi‐ periodically symmetric feature of the shrouded blades and disc system for analysing the coupling vibration characteristic of a system which has freely slipping contact surfaces. This technique has led to the establishment of an entirely new dynamic analysis method. With this method, the scale of calculation required has been greatly reduced, relieving the demand on CPU time and storage capacity while still ensuring sufficient accuracy of dynamic analysis.